Operating instructions For Vibration level switch. Model NSV

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1 Operating instructions For Vibration level switch Model NSV

2 1. Content 1. Content Note Instrument Inspection Regulation use Operating Principle Mechanical Connection Electrical connection Commissioning Maintenance Technical information Order Codes Dimensions, standard models Safety Instructions (ATEX) Installation in classified zone (ATEX) Label Description (ATEX) Dimensions, ATEX models Declaration of conformance ATEX Certificate Notes Manufactured by: Kobold Mesura S.L.U Guifre 655 1ª Planta Badalona Tel.: Fax: info.es@kobold.com Internet: Page 2 DT0335

3 K03/0111 DT0335 Page 3

4 2. Note Please read these operating instructions before unpacking and putting the unit into operation. Follow the instructions precisely as described herein. The devices are only to be used, maintained and serviced by persons familiar with these operating instructions and in accordance with local regulations applying to Health & Safety and prevention of accidents. When used in machines, the measuring unit should be used only when the machines fulfil the EWG-machine guidelines. 3. Instrument Inspection Instruments are inspected before shipping and sent out in perfect condition. Should damage to a device be visible, we recommend a thorough inspection of the delivery packaging. In case of damage, please inform your parcel service / forwarding agent immediately, since they are responsible for damages during transit. Scope of delivery: The standard delivery includes: - Level Monitor for Bulk model: NSV - Operating instructions 4. Regulation use The Level Monitor is designed for the selective level monitoring of bulk materials, especially for bulk material with low bulk density. This level monitor is not sensitive to material dampness and can be employed regardless of the composition of the bulk material. Any use of the Level Monitor for Bulk, model: NSV, which exceeds the manufacturer s specification may invalidate its warranty. Therefore, any resulting damage is not the responsibility of the manufacturer. The user assumes all risk for such usage. Page 4 DT0335

5 5. Operating Principle The Level Monitor model NSV has decisive advantages, especially with bulk goods with low bulk density. The senor consists of a connecting head, which contains the electronics, and an adaptor with an oscillating fork. The latter is responsible for the direct contact with the bulk material. Two piezoelectric crystals start the fork vibrating at about 100 Hz. As soon as the fork is covered with the bulk material its vibration is dampened. This damping is detected in a pluggable evaluation module and transformed into a potential-free limit contact. With the aid of a selector switch (A and B) the relay can be switched on or off with every contact of the fork with the bulk material. At the same time, the electronics in the connecting head triggers the output relay. The electronics in the connecting head consists of a maintenance-friendly plug-in module that is fitted with an LED voltage supply indicator and an additional LED that lights up whenever the fork touches the medium. In addition to the standard version NSV-8200, the devices can also be provided for vertical installation with an extended neck pipe (NSV-8201). The maximum length of the neck pipe is 3000 mm. The plug-in evaluation module can be changed easily so that the devices are really easy to maintain. DT0335 Page 5

6 6. Mechanical Connection Before installation: Remove all packing materials and transport retainers and ensure that no such materials remain in the device. Make sure that the permitted max. operational pressure and temperature limits are not exceeded (see chapter 10 Technical Information) The units may not be installed at a location within an inductive field. If possible, check directly after mechanical installation whether the connection thread to the pipe is fully sealed. INSTALLATION OF THE NSV VIBRATION LEVEL MONITOR The NSV series vibration level monitor is physically connected with a 1 ½ male thread. For installation you should use the hexagonal adaptor (60 mm spacing) of a suitable wrench. THE FOLLOWING MUST BE OBSERVED UNDER ALL CIRCUMSTANCES: When the bulk material container is being filled, the NSV level monitor must not come into contact with the inflowing medium. If this is however not possible, the vibrating fork must be fitted with a suitable protective covering. Make sure that the fork is always positioned correctly inside the bulk container and that no bulk material deposit is formed on it, since this can result in incorrect readings. If the NSV level monitor is built in laterally you must ensure that the markings on the adaptor are vertical in relation to the side of the container. When the NSV vibration level monitor is installed vertically a minimum distance must be maintained between the fork and the container wall otherwise this area could be filled with a deposit of the bulk material. Whenever possible the NSV level monitor should be fitted with a slight downward inclination. This prevents bulk material sticking to the vibrating fork when the container is being emptied. The level monitor should also be installed in such a position that there are no parts in its immediate vicinity that could trigger vibrations in the inside of the container, since this can also lead to incorrect readings or damage. For correct positioning the connection head (resp. cable bushing) is 350º rotatable. Page 6 DT0335

7 NSV Example of right installation DT0335 Page 7

8 7. Electrical connection The voltage supply to the NSV level monitor is via the connecting terminals L1 (+) and N(-) Suitable safety fuses are to be built in to the electric input lead. The green LED indicates that there is power to the device. Before connecting the device check that the supply voltage matches the characteristics of the NSV level monitor. 8. Commissioning RELAY OPERATION When the red LED lights up, this indicates contact between vibrating fork and medium. Ensure that the red LED works independently of the position of the SELECTION SWITCH. As long as the fork vibrates, the red LED will not light up. As soon as the vibrating fork comes into contact with the bulk material the red LED indicator will light up. SELECTION SWITCH (A or B) The on and off state of the output relay depends on the position of the SELECTION SWITCH. POSITION A: The relay remains switched off as long as the medium does NOT touch the vibrating fork. POSITION B: The relay remains switched on as long as the medium does NOT Page 8 DT0335

9 touch the vibrating fork. 9. Maintenance The Level Monitor has to be controlled regularly for deposits of bulk material in the area of the vibration fork. Therefore we recommend a periodic cleaning. The connection housing should be checked periodically for mechanical damages to guarantee the indicated protection class. DT0335 Page 9

10 10. Technical information Note: Kobold Mesura makes every attempt to ensure the accuracy of these specifications but reserves the right to change them at any time. Measuring principle: Max. length of immersion length: vibration 3000 mm Medium temperature: -20 to +80 C Ambient temperature: -20 to +60 C Minimum density of bulk: 60 g/l Fork material: stainless steel (1.4305) Housing material: Polycarbonate, 350 turnable Mechanical connection: G 1 1/2, stainless steel (1.4305) Electrical connection: Supply voltage: Maximum power input: Relay output: via 1 (2) cable gland M20x1.5 24, 110, 230 VAC 50/60 Hz or VDC 1 VA max. 250 VAC, 1 A Protection: IP 65 ATEX marking: II 1/2 D Ex td A20/21 IP 65 T85 C -20 C Ta +60 C Page 10 DT0335

11 11. Order Codes Order Details (Example: NSV G8 0 0) Immersion Model Version Material length Mechanical connection ATEX Supply voltage NSV- 8 = standard 2 = stainless steel = standard, short version 01 = extended version (max 3m) G8 = G1 ½ 0 = without E = ATEX 0 = 230V AC 2 = 24V AC 3 = V DC 4 = 100V AC 12. Dimensions, standard models NSV-8200G800 NSV-8201G800 DT0335 Page 11

12 13. Safety Instructions (ATEX) 1. Validity This safety instructions must be applied to the ATEX-conform vibration level switch series NSV.E, used in dust explosion hazard environments, category 1/2 D. 2. General considerations. Working principle of level switches NSV...E is vibrating fork, generated with a piezo electric oscillator fixed to a tuning fork. Detection is done with a piezo electric sensor that is measuring the amplitude difference when fork is in contact or not with the product. It can be used also in hazardous zones. They are designed to be used in explosion-proof areas classified as group II, category 1/2D. Sensor element can be installed in hazardous areas category 1 under ATEX approval 1/2D Ex td. The mechanical side of the instrument (thread connection and tuning fork) can be installed in hazardous areas category 2, as mentioned in ATEX approval 1/2D Ex td. When installing the device it is necessary to follow all instructions and regulations for explosion-proof areas and the safety instructions included in this manual. Inlet bushings and electrical connections must conform to the certification for their type in accordance with the directive. Verify that label contents fits requirements of application. All requirements of the 94/9/CE Directive must be correctly followed and also the national rules related to measurement instruments used in hazardous areas. For instance: EN :2006, EN :2004, EN :2006 and all the other ones related to the required certification. Remove power supply before opening cover of the housing or at least be sure that no explosion risk is present. Check that cover of housing is correctly mounted before applying power to the instrument. Verify that there is no mechanical stress due to installation on the tank. It is very important to verify that the instrument ground and the system ground are correctly connected. Page 12 DT0335

13 The installation of instruments in hazardous areas must be exclusively done by trained people. NSV 3. Protection against electrostatic discharge Level switches with plastic parts that can acquire electrostatic charges, must have a corresponding warning label. Avoid situations of electrostatic discharges like: -Avoid friction on plastic parts. -Avoid cleaning with a dry cloth -Avoid installing close the steam sources or pneumatic product sources. 4.Chemical resistance: Verify that materials of the instrument are chemically compatible with the product to measure and application. 14. Installation in classified zone (ATEX) In classified zones, NSV. ATEX version, must be installed with the housing in zone 21,22 (category 2) or NOT CLASSIFIED. Process connection is mounted in the border wall between areas of category 2 and 1. fork can be mounted in ZONE20 (Category 1). Installation must be done by people trained in ATEX environments. DT0335 Page 13

14 15. Label Description (ATEX) 16. Dimensions, ATEX models NSV-8200G8E0 NSV-8201G8E0 Page 14 DT0335

15 17. Declaration of conformance DECLARACIÓN DE CONFORMIDAD CE EC DECLARATION OF CONFORMITY EG-KONFOMITÄTSERKLÄRUNG DÉCLARATION DE CONFORMITÉ DICHIARAZIONE DI CONFORMITÀ CE DT0323 KOBOLD MESURA S.L.U. Guifré 655, Badalona (España) Declara, bajo la propia responsabilidad, que el producto Declares under our sole responsibility, that the product Erklärt in alleiniger Verantwortung, daß das produkt Déclare sous sa seule responsabilité, que le produit Dichiara sotto la propia responsabilità, che il prodotto SOLIVIB...E.. / NSV...E.. A los cuales se refiere esta declaración, son conformes a las siguiente Directivas Europeas: To which this declaration relates is in conformity with the following European Directives: An auf das diese Erklärung verweist, sie mit den Europäischen Richtlinien im Einklang stehen folgend: À auxquels se réfère cette déclaration, ils sont conformes aux Directives Européennes suivant : A ai quali si riferisce questa dichiarazione, sono conformi alle direttive europee seguente: EMC2004/108/CEC Directiva Ex 94/9/EC Normas armonizadas y documentos de la normativa aplicados: Applied harmonised standards and normative documents: Angewandte harmonisierte Normen oder normativer Dokumente: Normes harmonisées et documents normatifs appliqués Norme armonizzate e documenti normativi applicati: DT0335 Page 15

16 EN : EN :2002 EN :2002 EN :2004 EN :2006 Certificado de examen CE de tipo EC-type examination certificat EG-baumusterprübescheinigung Attestation d examen CE de type Certificazione per esame di tipo CE Marcado Marking Markierung Inscription Marcatura LOM 08ATEX2039 II 1/2D Ex td A20/A21 IP65 T80ºC -20ºC Ta 60ºC Fabricado en: KOBOLD MESURA SLU C/ Guifré 655, BADALONA (Spain) Made in: Hergesteltlt in: Fabriqué dans: Fabbricato in: Organismo notificado: Número notificación : LOM 0163 LOM 05ATEX9070 Notified organism Mitgeteilter Organismus Organization annoncée Organismo informato Badalona 5 Febrero 2008 Number notification Zahlmitteilung Nombre notification Notifica di numero Gerente Antonio Sánchez Tomás Page 16 DT0335

17 18. ATEX Certificate DT0335 Page 17

18 Page 18 DT0335

19 DT0335 Page 19

20 19. Notes Page 20 DT0335

21 DT0335 Page 21

22 KOBOLD MESURA S.L.U C/Guifré Badalona Tel.: Fax: Technical data Subject to change without prior notice.

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